<!DOCTYPE html>
<html>
<table border="1" width="200">
	<tr>
		<th>居左</th>
		<th>居中</th>
		<th>居右</th>
	</tr>
	<tr>
		<td align="left">a</td>
		<td align="center">b</td>
		<td align="right">c</td>
	</tr>
</table>
</html>